/*
 * Copyright (c) 2022-2022 Huawei Technologies Co., Ltd. All rights reserved.
 * Copyright (c) 2022-2022 Huawei Device Co., Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 * of conditions and the following disclaimer in the documentation and/or other materials
 * provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 * to endorse or promote products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include "It_posix_container.h"
#include "sys/utsname.h"

int const CHILD_FUNC_ARG = 0x2088;
const int TEST_SET_OLD_ID = 1001;
const int TEST_SET_NEW_ID = 4;

std::string GetIdMapPath(int pid, const std::string& mapType) 
{
    std::ostringstream buf;
    buf << "/proc/" << pid << "/" << mapType;
    return buf.str();
}

int WriteIdMap(int pid)
{
    std::string uidMapPath = GetIdMapPath(pid, "uid_map");
    std::string gidMapPath = GetIdMapPath(pid, "gid_map");

    const char* idMapStr = "0 1000 1\n1 1001 1\n2 1002 1\n3 1003 1\n4 1004 1\n";
    int strLen = strlen(idMapStr);

    int uidMap = open(uidMapPath.c_str(), O_WRONLY);
    ICUNIT_ASSERT_NOT_EQUAL(uidMap, -1, uidMap);

    int ret = write(uidMap, idMapStr, strLen);
    ICUNIT_ASSERT_EQUAL(ret, strLen, ret);

    close(uidMap);

    int gidMap = open(gidMapPath.c_str(), O_WRONLY);
    ICUNIT_ASSERT_NOT_EQUAL(gidMap, -1, gidMap);

    ret = write(gidMap, idMapStr, strLen);
    ICUNIT_ASSERT_EQUAL(ret, strLen, ret);

    close(gidMap);
    return 0;
}

static int childFunc(void *arg) 
{
    sleep(3);

    int newUid = getuid();
    ICUNIT_ASSERT_EQUAL(newUid, 1, newUid);
    int newGid = getgid();
    ICUNIT_ASSERT_EQUAL(newGid, 1, newGid);

    int ret = setuid(TEST_SET_NEW_ID);
    ICUNIT_ASSERT_EQUAL(ret, 0, ret);
    ret = setgid(TEST_SET_NEW_ID);
    ICUNIT_ASSERT_EQUAL(ret, 0, ret);

    newUid = getuid();
    ICUNIT_ASSERT_EQUAL(newUid, TEST_SET_NEW_ID, newUid);
    newGid = getgid();
    ICUNIT_ASSERT_EQUAL(newGid, TEST_SET_NEW_ID, newGid);

    return 0;
}

static UINT32 Testcase(void)
{
    int ret = setuid(TEST_SET_OLD_ID);
    ICUNIT_ASSERT_EQUAL(ret, 0, ret);
    int oldUid = getuid();
    ICUNIT_ASSERT_EQUAL(oldUid, TEST_SET_OLD_ID, oldUid);

    ret = setgid(TEST_SET_OLD_ID);
    ICUNIT_ASSERT_EQUAL(ret, 0, ret);
    int oldGid = getgid();
    ICUNIT_ASSERT_EQUAL(oldGid, TEST_SET_OLD_ID, oldGid);

    int arg = CHILD_FUNC_ARG;
    auto pid = CloneWrapper(childFunc, CLONE_NEWUSER, &arg);
    ICUNIT_ASSERT_NOT_EQUAL(pid, -1, pid);

    ret = WriteIdMap(pid);
    ICUNIT_ASSERT_EQUAL(ret, 0, ret);

    int status;
    ret = waitpid(pid, &status, 0);
    ICUNIT_ASSERT_EQUAL(ret, pid, ret);

    int oldUid1 = getuid();
    ICUNIT_ASSERT_EQUAL(oldUid1, TEST_SET_OLD_ID, oldUid1);
    int oldGid1 = getgid();
    ICUNIT_ASSERT_EQUAL(oldGid1, TEST_SET_OLD_ID, oldGid1);

    ICUNIT_ASSERT_EQUAL(oldUid, oldUid1, ret);
    ICUNIT_ASSERT_EQUAL(oldGid, oldGid1, ret);
    return 0;
}

void ItPosixContainer011(void)
{
    TEST_ADD_CASE("IT_POSIX_CONTAINER_011", Testcase, TEST_POSIX, TEST_CONTAINER, TEST_LEVEL0, TEST_FUNCTION);
}
